Jobber:

Yes, I also replaced the tranny mount -- far easier than the others, don't even need to jack the car up (you do need to support the tranny while changing the mount.

You will probably have to jack the engine up somewhat to get to the top bolts out of the old engine mounts -- 19 mm wrench. 6 mm allen screws hold the mounts to the frame, easy to reach when the heat shields are off. Will make a BIG difference on where the engine sits, make sure the fan shroud is loose before you start.

You will also need new engine shocks if the mounts are very squashed -- the ones from the W107 fit if you file the holes in the steel caps out a bit (shaft on new shocks is a bit larger) and you will need an extra rubber buffer since the top shaft is longer, but the cost less than half as much as the actual replacements, if you can get them. One of mine was bent and stuck, the other empty and useless.

Bad subframe bushings will lower the body about an inch and a half.

No difference in weight between the M116 and M117 engines, I think the only difference is that the M116 is a "stroker" -- shorter crank throws, longer rods.

Peter

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1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!